(I work as a nurse for outpatient procedures. A patient has come in for a not-very-painful procedure, and has already received all of the drugs that we can safely give her for pain. This amount would have had a normal person sleeping by now.)

(I am an ER nurse. During the late morning, a man comes in with his son, who has a concussion. The policy is that a concussion patient isn’t allowed to sleep at all. The nurses and staff make sure the boy stays awake and notice that he keeps nodding off a little too easily.)

Me: “Excuse me, but why is your son so tired?”

Father: “Oh, he got his concussion in the wee hours of the morning and I just knew that he couldn’t fall asleep. So he’s been awake since then.”